Download Stock ROM ASUS Zenfone 2 (ZE551ML)

Stock ROM is an Android system that by default is still intact from the factory according to their respective vendors, as in this post is Stock ROM for ASUS Zenfone devices. Stock ROM in this post is used to update the system or downgrade the Android system on your ASUS Zenfone device.

To upgrade or downgrade your ASUS Zenfone system, all you have to do is download the Stock ROM file according to your needs, after that! you can insert the file into the ASUS Zenfone SDCard memory, then restart your device and then you will find the Update / Downgrade notification that appears on your Android device's screen.